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um: fill the handlers array at build time

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Al Viro 2011-08-18 20:04:39 +01:00 committed by Richard Weinberger
parent e87df986ed
commit 00361683ce
4 changed files with 21 additions and 12 deletions
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2
arch/um/include/shared/os.h
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@ -225,7 +225,7 @@ extern char *get_umid(void);
extern void timer_init(void);
extern void set_sigstack(void *sig_stack, int size);
extern void remove_sigstack(void);
extern void set_handler(int sig, void (*handler)(int));
extern void set_handler(int sig);
extern int change_sig(int signal, int on);
extern void block_signals(void);
extern void unblock_signals(void);

12
arch/um/os-Linux/process.c
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@ -235,13 +235,13 @@ out:
void init_new_thread_signals(void)
{
set_handler(SIGSEGV, (__sighandler_t) sig_handler);
set_handler(SIGTRAP, (__sighandler_t) sig_handler);
set_handler(SIGFPE, (__sighandler_t) sig_handler);
set_handler(SIGILL, (__sighandler_t) sig_handler);
set_handler(SIGBUS, (__sighandler_t) sig_handler);
set_handler(SIGSEGV);
set_handler(SIGTRAP);
set_handler(SIGFPE);
set_handler(SIGILL);
set_handler(SIGBUS);
signal(SIGHUP, SIG_IGN);
set_handler(SIGIO, (__sighandler_t) sig_handler);
set_handler(SIGIO);
signal(SIGWINCH, SIG_IGN);
signal(SIGTERM, SIG_DFL);
}

17
arch/um/os-Linux/signal.c
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@ -111,7 +111,7 @@ void alarm_handler(int sig, struct sigcontext *sc)
void timer_init(void)
{
set_handler(SIGVTALRM, (__sighandler_t) alarm_handler);
set_handler(SIGVTALRM);
}
void set_sigstack(void *sig_stack, int size)
@ -124,7 +124,17 @@ void set_sigstack(void *sig_stack, int size)
panic("enabling signal stack failed, errno = %d\n", errno);
}
static void (*handlers[_NSIG])(int sig, struct sigcontext *sc);
static void (*handlers[_NSIG])(int sig, struct sigcontext *sc) = {
[SIGSEGV] = sig_handler,
[SIGBUS] = sig_handler,
[SIGILL] = sig_handler,
[SIGFPE] = sig_handler,
[SIGTRAP] = sig_handler,
[SIGIO] = sig_handler,
[SIGWINCH] = sig_handler,
[SIGVTALRM] = alarm_handler
};
static void handle_signal(int sig, struct sigcontext *sc)
{
@ -173,13 +183,12 @@ static void hard_handler(int sig, siginfo_t *info, void *p)
handle_signal(sig, (struct sigcontext *) &uc->uc_mcontext);
}
void set_handler(int sig, void (*handler)(int))
void set_handler(int sig)
{
struct sigaction action;
int flags = SA_SIGINFO | SA_ONSTACK;
sigset_t sig_mask;
handlers[sig] = (void (*)(int, struct sigcontext *)) handler;
action.sa_sigaction = hard_handler;
/* block irq ones */

2
arch/um/os-Linux/skas/process.c
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@ -659,7 +659,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
{
int n;
set_handler(SIGWINCH, (__sighandler_t) sig_handler);
set_handler(SIGWINCH);
/*
* Can't use UML_SETJMP or UML_LONGJMP here because they save